@Setanta,
Good question. I think I use the word 'pure' in four main ways.
Pure Awareness: what most fundamentally IS, the infinite, eternal self-experiencing presence of Reality itself.
Pure Experiencing: what is most fundamentally 'going on', seamless experiencing OF Reality itself BY Reality itself, that is not actually divided into an 'experiencer' and what is 'experienced'. This causes Reality itself to APPARENTLY (but not actually) bifurcate into;
Pure Chaos: always different, never the same, from moment to moment. The 'experienced'. Infinite emptiness.
Pure Order: always the same, never different, from moment to moment. The 'experiencer'. Finite form.